Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Tire split Safety Concern

Search
Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Tire split Safety Concern

Thread Tools
 
Search this Thread
 
Old 05-07-17 | 04:28 PM
  #1  
Thread Starter
Senior Member
 
Joined: Apr 2012
Posts: 56
Likes: 0
From: Vancouver BC
Tire split Safety Concern

Just noticed this on my Vredestein Freccia Tricomp with under 500Km on them. There is splitting on various spots to top side rubber as pictured. Is this normal or safe to ride on or should I be looking for new tires.
WP_20170507_15_07_38_Pro.jpg
J.Drop is offline  
Reply
Old 05-07-17 | 05:11 PM
  #2  
Bill Kapaun's Avatar
Really Old Senior Member
15 Anniversary
Community Builder
 
Joined: Feb 2007
Posts: 14,679
Likes: 1,916
From: Mid Willamette Valley, Orygun

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3

How old are they?
How much UV exposure?
Bill Kapaun is online now  
Reply
Old 05-07-17 | 05:46 PM
  #3  
Senior Member
15 Anniversary
 
Joined: Apr 2010
Posts: 2,968
Likes: 521
From: Elevation 666m Edmonton Canada

Bikes: 2013 Custom SA5w / Rohloff Tourster

Looks like nothing to me.
GamblerGORD53 is offline  
Reply
Old 05-07-17 | 07:15 PM
  #4  
Andrew R Stewart's Avatar
Senior Member
Titanium Club Membership
10 Anniversary
 
Joined: Feb 2012
Posts: 19,381
Likes: 5,526
From: Rochester, NY

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB

The good thing about tire tread cap cracks is that they tend to be slow in development. When the casing cords start showing in a significant way or the tread cap has a big flap do something quick. Until then just budget for a replacement tire and buy one as you can, before the just mentioned issues show. Andy
Andrew R Stewart is offline  
Reply
Old 05-07-17 | 09:23 PM
  #5  
Senior Member
15 Anniversary
 
Joined: Apr 2010
Posts: 2,968
Likes: 521
From: Elevation 666m Edmonton Canada

Bikes: 2013 Custom SA5w / Rohloff Tourster

Originally Posted by Andrew R Stewart
The good thing about tire tread cap cracks is that they tend to be slow in development. When the casing cords start showing in a significant way or the tread cap has a big flap do something quick. Until then just budget for a replacement tire and buy one as you can, before the just mentioned issues show. Andy
This is a Michelin tire, not a Conti.
GamblerGORD53 is offline  
Reply
Old 05-07-17 | 09:28 PM
  #6  
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Stuff like that is fairly common, especially if a tire is ridden slightly underinflated, or by a heavy rider.

However, it's not of any concern, since the rubber is just a cover over the tires structure. The only issue may be that over time, the bond between the tread rubber and tire body will weaken, allowing the tread to break off in pieces. That doesn't happen overnight, and progresses slowly so you have plenty of time to decide when you want to call it.

Those of riding high end tubulars are used to tread separation on old tires, and learn to glue it back down with rebber cement.
FBinNY is offline  
Reply
Old 05-07-17 | 10:17 PM
  #7  
Andrew R Stewart's Avatar
Senior Member
Titanium Club Membership
10 Anniversary
 
Joined: Feb 2012
Posts: 19,381
Likes: 5,526
From: Rochester, NY

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB

Originally Posted by GamblerGORD53
This is a Michelin tire, not a Conti.

And this means what? Andy
Andrew R Stewart is offline  
Reply
Old 05-07-17 | 10:21 PM
  #8  
Banned
 
Joined: Jun 2010
Posts: 43,586
Likes: 1,380
From: NW,Oregon Coast

Bikes: 8

Replace the tire .
fietsbob is offline  
Reply
Old 05-07-17 | 10:56 PM
  #9  
Thread Starter
Senior Member
 
Joined: Apr 2012
Posts: 56
Likes: 0
From: Vancouver BC
Thanks for all the info guys this is section is just a blessing.

Originally Posted by Bill Kapaun
How old are they?
How much UV exposure?
The tires were purchased last summer and put in use late last fall. My bike is kept in a dimly lit garage and I only ride from late spring to end of fall, so really don't know why both tires are doing this so quickly.


Originally Posted by FBinNY
Stuff like that is fairly common, especially if a tire is ridden slightly underinflated, or by a heavy rider.

However, it's not of any concern, since the rubber is just a cover over the tires structure. The only issue may be that over time, the bond between the tread rubber and tire body will weaken, allowing the tread to break off in pieces. That doesn't happen overnight, and progresses slowly so you have plenty of time to decide when you want to call it.

Those of riding high end tubulars are used to tread separation on old tires, and learn to glue it back down with rebber cement.
I weight 160lbs and pump my tires up to 120psi every ride. They are rated for 110-160psi... Should I have pumped them up higher.

All in all I will be picking up spares when my saddle comes back in stock. Ill just keep an eye on these
J.Drop is offline  
Reply
Old 05-07-17 | 11:06 PM
  #10  
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Originally Posted by J.Drop
I weight 160lbs and pump my tires up to 120psi every ride. They are rated for 110-160psi... Should I have pumped them up higher.
No need to change anything, though if this is in the rear tire another 10psi might be OK. i said it happens especially with underinflation, but it also happens when all is right in the world. For example the tire may have a woven belt under the tread, and the crack is at the edge of the belt, kind of like how a black top road may develop cracks at the concrete road bed edge.

it's fine to keep an eye on it, but don't lose any sleep because it's not an indicator of anything to worry about.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Reply
Old 05-08-17 | 01:48 PM
  #11  
Thread Starter
Senior Member
 
Joined: Apr 2012
Posts: 56
Likes: 0
From: Vancouver BC
Originally Posted by FBinNY

it's fine to keep an eye on it, but don't lose any sleep because it's not an indicator of anything to worry about.
That comforting to hear, was worried and took it really easily while riding yesterday. I'm still wondering how this happened to such a new set of tires. Most reviews spoke really highly about their durability and such.
J.Drop is offline  
Reply
Old 05-08-17 | 02:56 PM
  #12  
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Originally Posted by J.Drop
That comforting to hear, was worried and took it really easily while riding yesterday. I'm still wondering how this happened to such a new set of tires. Most reviews spoke really highly about their durability and such.
There's n o need to wonder because it's fairly normal. It'll happen if/where there's some change in flex properties. It's similar to how roads will form parallel cracks where the blacktop overhangs the road bed, and you see it everywhere.

It's possible that your tire has a belt under the tread, and the crack is at the edge of that, or where there's a sudden change in tread thickness. But until/unless the tread starts peeling away from the tire body, it's just one of those things.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
johngwheeler
Bicycle Mechanics
7
08-31-17 12:26 PM
spectastic
Bicycle Mechanics
28
05-04-17 11:51 AM
PistolSlap
General Cycling Discussion
13
11-30-14 05:51 PM
on the path
Road Cycling
15
09-05-13 01:48 AM
roka
Bicycle Mechanics
13
02-08-13 05:07 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.